Holographic Memory-AISHWARYA-C.S. 3RD SEM

7/23/2019 Holographic Memory-AISHWARYA-C.S. 3RD SEM

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PRESENTED TO: PRESENTED BY:VANDANA MAAM AISHWARYA AGRAWAL

ROLL NO. 1445010003

2014- (3RDSEM, .S.!

SHRI RAM MURTI SMARAK WOMENS

COLLEGE OF ENGINEERING &

TECHNOLOGY

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TECHNICAL SEMINAR ON THE

TOPIC HOLOGRAPHIC MEMORY

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INDEX

INTRODUCTIONRECORDING DATA

READING DATA

LONGEVITY

TECHNICAL ASPECTS

TWO-COLOUR RECORDING

EFFECT OF ANNEALING

DEVELOPMENT AND MARKETING

CONCLUSION

REFERENCES

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INTRODUCTION

Holographic data storage is a potentialtechnology in the area of high-capacity. Datastorage is currently dominated by magneticdata storage and conventional optical data

storage. Magnetic and optical data storagedevices rely on individual bits being stored asdistinct magnetic or optical changes on thesurface of the recording medium. Holographicdata storage records information throughoutthe volume of the medium and is capable ofrecording multiple images in the same areautilizing light at dierent angles.

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HOLOGRAM OF PRINCESS LEIA

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RECORDING DATA

Holographic data storage containsinformation using an opticalinterference pattern within a thick,photosensitive optical material. ightfrom a single laser beam is divided intotwo separate optical patterns of darkand light pi!els. "y ad#usting thereference beam angle, wavelength, ormedia position, a multitude ofholograms $theoretically, severalthousand% can be stored on a single

volume.


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READING DATA

&he stored data is read through thereproduction of the same reference beamused to create the hologram. &he referencebeam's light is focused on the photosensitive

material, illuminating the appropriateinterference pattern, the light diracts on theinterference pattern, and pro#ects the patternonto a detector. &he detector is capable ofreading the data in parallel, over one millionbits at once, resulting in the fast datatransfer rate. (iles on the holographic drivecan be accessed in less than ).* seconds.

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LONGEVITY

Holographic data storage can providecompanies a method to preserve andarchive information.

&he write-once who approach to data

storage would ensure content security,preventing the information from beingoverwritten or modi+ed.

Manufacturers

believe this technologycan provide safe storage for contentwithout degradation for more than )

years.

ounterpoints to this claim are that 1$


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/f this trend continues to follow thenthe stored data for )0)) years onone format will be irrelevant, because

one would migrate the data to a newformat only after ten years.However, claimed longevity of storagehas, in the past, proven to be a keyindicator of shorter-term reliability ofstorage media. urrent optical formats such as D have largely lived up to

the original longevity claims $wherereputable media makes are used% andhave proved to be more reliableshorter-term data carriers than the

1oppy disk. 11


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TECHNICAL ASPECTS%

ike other media, holographic media isdivided into write once and rewritablemedia . 2ewritable holographicstorage can be achieved via the

photorefractive eect in crystals3

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Mutually coherent light from two sourcescreates an interference pattern in the

media. &hese two sources are called thereference beam and the signal beam.&he faster the rate of recombination, willaect the strength of the hologram.

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TWO-COLOUR RECORDING

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4trongly o!idized sample holograms cannotbe easily recorded and the diractione5ciency is very low.

&his is because the shallow trap iscompletely empty and the deep trap is alsoalmost devoid of electrons.&his results in very good sensitivity $fast

recording% and high diraction e5ciencydue to the availability of electrons in theshallow traps. However all the deep trapsget +lled 6uickly and the resultingholograms reside in the shallow traps where

they are totally erased. Hence the diractione5ciency drops to zero and the hologram

stored cannot be +!ed

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DEVELOPMENT & MARKETING

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7t the 8ational 7ssociation of "roadcasters *))

$87"% convention in as 9egas, /n:haseconducted public demonstrations of the world's+rst prototype of a commercial storage device atthe Ma!ell orporation of 7merica booth.&he three main companies involved in developing

holographic memory, as of *))*, were /n:haseand :olaroid spino 7prilis in the ;nited 4tates,and ?)s,andhas been touted for near-term commercial

application at least since *))0.

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VIDEO GAME MARKET

8intendo +led a =oint 2esearch 7greementwith /n:hase for holographic storage in *))@.

8intendo has also mentioned in the patent as

a #oint applicant3 A... disclosure is herein madethat the claimed invention was made pursuantto a =oint 2esearch 7greement as de+ned inB ;.4.. 0)B $c%$B%, that was in eect on or

before the date the claimed invention wasmade, and as a result of activities undertakenwithin the scope of the =oint 2esearch

7greement, by or on the behalf of 8intendoo., and /n:hase &echnologies, /nc.A

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CONCLUSION

7t the end / would like to say that holographicdata storage is very useful if we see it with the

point of our developing technology, but it is

not a useful invention for the common people.Ces it is true that it is somehow bene+cial forthe industries making movies because as thetechnology is developing people want to see

something new every now and then.4o this invention would create a good impactamong the common people also.

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REFERENCES

Jump up ^Holographic 4torage (irm/n:hase&echnologies 4huts DownE.&elevision "roadcast. (ebruary @, *)0)

Jump up ^FG ;nveils ))-F", Holographic Disc 4torage &echnology. 28. 7pril *, *))>

Jump up ^Aould Holography ure 8intendo's 4torage4pace "luesI 8ewsA. =uly B), *))@.

Jump up ^/nphase &echnologies, /nc.

$ongmont, olorado, ;4% and 8intendo 24
https://en.wikipedia.org/wiki/Holographic_data_storagehttps://en.wikipedia.org/wiki/Holographic_data_storagehttp://www.televisionbroadcast.com/article/94340http://www.televisionbroadcast.com/article/94340http://www.televisionbroadcast.com/article/94340https://en.wikipedia.org/wiki/Holographic_data_storagehttp://www.crn.com/storage/217200230;jsessionid=PCLSSR1JXVD1OQSNDLOSKHSCJUNN2JVNhttp://www.crn.com/storage/217200230;jsessionid=PCLSSR1JXVD1OQSNDLOSKHSCJUNN2JVNhttps://en.wikipedia.org/wiki/Holographic_data_storagehttp://www.totalvideogames.com/Nintendo-Wii/news/Could-Holography-Cure-Nintendo039s-Storage-Space-Blues-13031.htmlhttp://www.totalvideogames.com/Nintendo-Wii/news/Could-Holography-Cure-Nintendo039s-Storage-Space-Blues-13031.htmlhttps://en.wikipedia.org/wiki/Holographic_data_storagehttps://en.wikipedia.org/wiki/Holographic_data_storagehttp://www.totalvideogames.com/Nintendo-Wii/news/Could-Holography-Cure-Nintendo039s-Storage-Space-Blues-13031.htmlhttp://www.totalvideogames.com/Nintendo-Wii/news/Could-Holography-Cure-Nintendo039s-Storage-Space-Blues-13031.htmlhttps://en.wikipedia.org/wiki/Holographic_data_storagehttp://www.crn.com/storage/217200230;jsessionid=PCLSSR1JXVD1OQSNDLOSKHSCJUNN2JVNhttp://www.crn.com/storage/217200230;jsessionid=PCLSSR1JXVD1OQSNDLOSKHSCJUNN2JVNhttps://en.wikipedia.org/wiki/Holographic_data_storagehttp://www.televisionbroadcast.com/article/94340http://www.televisionbroadcast.com/article/94340http://www.televisionbroadcast.com/article/94340https://en.wikipedia.org/wiki/Holographic_data_storagehttps://en.wikipedia.org/wiki/Holographic_data_storage


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Holographic Memory-AISHWARYA-C.S. 3RD SEM